Chapter 9 Review Questions

Gasoline costs $2.79 per gallon. If the price per gallon increases an average of 3% per month, how much will the price

of gas per gallon be in a year?

$3.98

In 1990, the cost of tuition at a state university was $4300. During the next 8 years, the tuition

rose 4% each year. Suppose you have a child that graduates from high school in the year

2030. How much could you expect to pay for their college tuition?

$20,644.39

A. Constant Increase

B. Constant Decrease

C. Exponential Growth

D. Exponential Decay

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xk

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Suppose your uncle left you $10,000 in his will for graduate school. You put it in an account that pays 6% annual yield. How much interest will

you have earned in six years?

$4,185.19

A new television costs $1200. The value of the television decreases by 21% each year. Estimate

the value of the television after 2 years.

$748.92

A. Constant Increase

B. Constant Decrease

C. Exponential Growth

D. Exponential Decay

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A diamond ring was purchased 20 years ago for $500. The value of the ring

increased by 8% each year. What is the value of the ring today?

$2,330.48

A. Constant Increase

B. Constant Decrease

C. Exponential Growth

D. Exponential Decay

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Suppose 12 deer are introduced to a 100 acre forest preserve. If the deer population doubles every year, how many deer with there be on the

preserve after 15 years?

196608

An airplane is flying at an altitude of 30,000 ft. The pilot is instructed to decrease the planes

altitude by 10% each minute. What will be the planes altitude in 15 minutes?

≈6,176 ft

A. Constant Increase

B. Constant Decrease

C. Exponential Growth

D. Exponential Decay

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1n 1991, there were a reported 28.5 thousand cases of tuberculosis reported in the U.S.

Reports indicate that the number of cases is supposed to decline by 4.33% each year. Predict

how many cases will be reported in 2008.

≈13.4 thousand

There are 40,000 homes in your city. Each year 10% of the homes are expected to disconnect their land lines and use their cell phones for

means of communication. How many homes will still have land lines in 15 year?

≈8,235

A new car costs $23,000. The value decreases by 15% each year. Estimate the value of the car

after 3 years.

$14,124.88

The high school enrollment in a rural community is currently 300 students and is

decreasing by 5% a year. How many student will there be in the school in 10 years?

≈179

In 2000, the average price of a football ticket for a Minnesota Vikings game was $48.28. During

the next 4 years, the price increased an average of 6% each year. How much will the average

price of a ticket be in the year 2015?

$115.71

A. Constant Increase

B. Constant Decrease

C. Exponential Growth

D. Exponential Decay

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A. Constant Increase

B. Constant Decrease

C. Exponential Growth

D. Exponential Decay

3.32110)( xxr

A. Constant Increase

B. Constant Decrease

C. Exponential Growth

D. Exponential Decay

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A. Constant Increase

B. Constant Decrease

C. Exponential Growth

D. Exponential Decay

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